Cobalt Digital COMPASS 9253 2x4 AES Audio Distribution Amplifier, 75 Ohms - Manual (Page 13)

13
EQ Switch — SW1 and SW2
The EQ Switches (SW1 and SW2) are used to insert the cable equalizer into the incoming AES/EBU
signal. The 9253 can recover digital audio signals conforming to AES/EBU specifications and
transmitted over 75ohm, coaxial cable, up to 600 metres (2000 ft) long without equalization. For cable
lengths in excess of 600 metres, we recommend that the input equalization be activated. Note that
switching the EQ in and out can cause audible artefacts.
•
Pressing the EQ Switches SW1 or SW2 will activate the appropriate yellow EQ
LED to indicate this feature is activated.
• While the EQ Switches SW1 or SW2 are activated pressing it again will disable
the EQ and the yellow EQ LED will go off.
LEDs
The front-edge of the card features LEDs that display the status of the input signals.
As selections are made in the menus, (refer the subsequent chapter for complete menu
descriptions), the LEDs display the status of the input signals. Descriptions are provided in the
following table:
LED Color Location Display and Description
Lock 1 Green
Top of the
card
When illuminated there is a valid AES/EBU signal at the input of
AES1.
No Lock
1
Red
Second
from the
top When illuminated a valid AES/EBU signal is not present at the input
of AES 1
EQ 1 Yellow
Third from
the top
When illuminated this indicates that the cable EQ for AES 1 has
been inserted by pressing SW1 or that feature has been enabled
through Dashboard.
Lock 2 Green
Fourth from
the top
When illuminated there is a valid AES/EBU signal at the input of AES
2.
No Lock
2
Red
Fifth from
the top When illuminated a valid AES/EBU signal is not present at the input
of AES 2.
EQ 2 Yellow
Sixth from
the top
When illuminated this indicates that the cable EQ for AES 2 has
been inserted by pressing SW2 or that feature has been enabled
through Dashboard.
Com
Activity
Green
Seventh
from the
top
When illuminated this indicates that the 9253 is communicating to
Dashboard through the CAN bus.
Error Red
Eighth from
the top When illuminated this indicates that there is an error in the
communications to Dashboard through the CAN bus.
Table 1. Status LED Descriptions